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All Journal SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Media Mesin: Majalah Teknik Mesin R.E.M (Rekyasa Energi Manufaktur) Jurnal JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY INVOTEK: Jurnal Inovasi Vokasional dan Teknologi Jurnal Rekayasa Material, Manufaktur & Energi Jurnal Teknik Mesin Indonesia Ihsan: Jurnal Pengabdian Masyarakat Jurnal MESIL (Mesin Elektro Sipil) ABDI SABHA (Jurnal Pengabdian kepada Masyarakat) Jurnal Talenta Sipil jes Jurnal Polimesin Majalah Teknik Mesin
khairul umurani
Fakultas Teknik Universitas Muhammadiyah Sumatera Utara
Religion Aerospace Engineering Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation

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Perpindahan Panas Dan Penurunan Tekanan Pada Saluran Segiempat Dengan Rusuk V 90 Derajat Khairul Umurani; Arya R. Nasution; D Irwansyah
Rekayasa Material, Manufaktur dan Energi Vol 4, No 1: Maret 2021
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v4i1.6694

Abstract

The augmentation of the heat transfer surface using ribs is often used in heat exchanger equipment, aiming to increase heat transfer between the main surface and its fluid. This study uses a rectangular channel with testing on the specimen the number of ribs V 2 with three lengths of 200 mm, a width of 150 mm, and plate thickness of 1 mm. Rectangular air duct consisting of a rectangular duct with dimensions of 150 mm x 75 mm and a length of 2000 mm, suction fan, plate-type electric heater, airflow straightener, U monometer, anemometer, ampere meter, voltmeter, speed controller, and thermocouple. The parameters varied were the incoming airflow velocity, namely 1 m / s, 2m / s, 3 m / s, 4 m / s, and 5m / s. The experimental results heat transfer coefficient at tighter ribs provides better heat transfer. The pressure drop in Pa at the tight rib distance is higher than the pressure drop at the spaced rib spacing
Pengaruh Diameter Lubang Pembangkit Vorteks Winglet Melengkung Terhadap Unjuk Kerja Apk Tipe Kompak Studi Eksperimental K.Umurani K.Umurani; Muharnif M.
Rekayasa Material, Manufaktur dan Energi Vol 2, No 1: Maret 2019
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (675.482 KB) | DOI: 10.30596/rmme.v2i1.3072

Abstract

Alat Penukar Kalor (APK) tipe kompak yang memiliki unjuk kerja yang optimal, yaitu perpindahan kalor yang maksimal dan penurunan tekanan yang minimal dengan volume konstruksi APK yang kecil dan ringan dengan memvariasikan diameter lubang pembangkit vorteks winglet melengkung berlubang terhadap unjuk kerja apk tipe kompak melalui studi eksperimental sehingga diperoleh penyerapan kalor yang maksimal dan efektifitas APK tipe kompak yang ditunjukan oleh koefisien perpindahan kalor dan mendapatkan penurunan tekanan total dan koefisein gesek yang terkait dengan desain pembangkit vorteks winglet melengkung berlubang. Model uji terdiri dari 12 pelat aluminium paralel dengan  ukuran 300 mm x 300 dan 12 mm jarak antar sirip . Percobaan dilakukan dengan sejumlah pasangan pembangkit vorteks  yang memiliki variasi diameter. Eksperiment dilakukan di terowongan angin dimana APK dipanaskan oleh air panas aliran silang (cross-flow). Udara yang dialirkan oleh blower, melewati generator vortex terpasang di bagian sirip aluminium. Seluruh data pengujian akan direkam setiap 3 detik   dengan Arduino PLX  Data Acquisition yang dihubungkan ke Laptop. Dalam penelitian ini sudut serangan dijaga konstan,β = 45, Dengan variasi diameter lubang pada pembangkit vorteks. Dari hasil pengujian alat penukar kalor terlihat bahwasanya alat-alat yang dibuat berkerja sesuai dengan yang diharapkan Winglet dengan lubang memiliki pengaruh dalam membuat aliran udara menjadi bergolak sehingga meningkatkan penyerapan kalor oleh udara. Pada penelitian ini terlihat bahwa diameter winglet sebesar 6 mm memberikan pengaruh yang baik dalam peningkatan penyerapan kalor dan juga penurunan tekanan yang relatif lebih rendah 
Analisa Pengaruh Diameter Impeller Terhadap Kapasitas Dan Penurunan Tekanan Blower Sentrifugal K. Umurani; Rahmatullah Rahmatullah; Fariz Aulia Rachman
Rekayasa Material, Manufaktur dan Energi Vol 3, No 1: Maret 2020
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (990.8 KB) | DOI: 10.30596/rmme.v3i1.4528

Abstract

Blower is a device used to increase or increase the pressure of air or gas that will be flowed in a particular room as well as suctioning certain air or gas where the Blower produces a relatively high pressure ratio with a greater volume of gas flow. At present the role of the Blower has begun to be widely used, especially in the engineering field, where the Blower role was created to facilitate the process of air exhaust. The blower itself is a producer of air movement which is generally used for ventilation. Blowers consist of several types, namely Axial Blowers and Centrifugal Blowers. Blowers have one component, namely Impeller. To determine the right diameter of the impeller, a performance test on centrifugal blowers with different variations in the size of the impeller diameter is needed, such as an anemometer, wattmeter and tachometer, and the impeller diameters are 180 mm, 190 mm and 200 mm with a rotational speed of 1500 rpm. The results obtained from testing on the diameter of the 200 mm impeller obtained the highest efficiency with a value of 0.0086%. The maximum air velocity is found in the diameter of the impeller with a size of 200 mm which is equal to 19.82 km / h. Then, the maximum pressure drop (∆p) is found at the diameter of the impeller with a size of 200 mm and 190 mm with the same result which is 136,206954 Pa. Then followed by the largest capacity value (Q) found in the variation of the diameter of the impeller with a size of 200 mm that is equal to 118.92 m3 / h. And the largest motor power is found in variations in the diameter of the impeller with a size of 200 mm that is equal to 62.85 W.
Pengembangan Lintasan Pahat Pada Pengefraisan “Umsu” Menggunakan Cnc Tu-3a Rahmatullah Rahmatullah; Khairul Umurani; Munawar Alfansury Siregar
Rekayasa Material, Manufaktur dan Energi Vol 4, No 1: Maret 2021
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v4i1.6690

Abstract

Computer numerically controlled (CNC) machines have long been known and used in various industrial sectors such as the aircraft, shipping, automotive, molding and others industries. Various types of existing CNC machines such as CNC turning, CNC milling, CNC shaping, CNC drilling, CNC laser cutting and others have been commonly used in various manufacturing industries. CNC machines for production units and training unit CNC machines can be used according to milling machining parameters, machine capacity, product quality targets and workpiece material types. In milling machining using a 3-A training unit CNC machine, the first step is to design a workpiece, design G and M codes, simulate it using software such as CAD / CAM and can also be done by simulating it with a pen plotter. After evaluating and the simulation results are in accordance with the workpiece design, it can be executed for product machining. Different designs of CNC machining products have different toolpaths. In general, there are three types of techniques for path generation tools, namely iso-parametric, iso-planner, and iso-scallop height. Tool path generation on "UMSU" CNC milling machining using the CNC TU-3A has been developed a toolpath generation suitable for the "UMSU" machining. The type of tool path generation technique to be used can be considered from several factors including the complexity of the product design, the type of milling tool used, product quality, machining time and other factors.
Analisis Kekasaran Permukaan Cast Iron Menggunakan Cairan Pendingin Berbasis Nabati Pada Proses Face milling Arya Rudi Nasution; Affandi Affandi; Khairul Umurani; Ahmad Marabdi Siregar
Rekayasa Material, Manufaktur dan Energi Vol 4, No 2: September 2021
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v4i2.8073

Abstract

The machining process is a major activity in the industry, especially in the automotive industry. The machining process is inseparable from the coolant (coolant), where the role of the coolant in the machining process is to act as cool working conditions, material cleaning, and corrosion prevention. The use of cutting fluid has a negative impact when waste management is not carried out properly, and it will be damaging to the environment and public health. In order to reduce environmental and health damage, development and research have now been carried out for the use of vegetable-based cutting fluid. cutting fluid vegetable-based are biodegradable, eco-friendly, odorless, and non-toxic. This study wants to compare the value of surface roughness using CO (coconut oil) and dromus in face milling machining. The machine used in this research is the conventional Emco F3 milling machine and the tools used are the TPKN 22VC2 series carbide insert tools and the workpiece material used is cast iron (gray cast iron). the value of surface roughness by measuring the roughness using the TR200 surface roughness tool. The results of roughness observations show that the surface roughness value using CO cutting fluid at a cutting speed of 60 mm/min is 1,297 Ra, at a cutting speed of 70 mm/min the roughness value is 0.877 Ra and at a cutting speed of 80 mm/min, it is 0.429 Ra. While the results of measuring surface roughness on the material using a coolant dromus, cutting speed of 60 mm/min are 0.811 Ra, at a cutting speed of 70 mm/min the surface roughness value is 0.804 and at a cutting speed of 80 mm/min the surface roughness value is 0.698 Ra. So can the conclusion be that cutting fluid CO is good to use as a coolant at high cutting speeds.
Analisa Numerik Pengaruh Diameter Lubang Berperforasi Rusuk V Terhadap Penurunan Tekanan Pada Saluran Segiempat K Umurani; M Muharnif; A M Siregar
Jurnal MESIL (Mesin Elektro Sipil) Vol. 2 No. 1 (2021): Jurnal MESIL (Mesin Elektro Sipil)
Publisher : Cered Indonesia Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53695/jm.v2i1.249

Abstract

Dalam saluran pendingin internal pada sudu turbin gas, struktur rusuk banyak digunakan untuk menambah perpindahan panas konvektif dengan aliran fluida pendingin yang melewati permukaan berusuk. Penelitian ini berkonsentrasi pada rusuk V berperforasi dengan lubang lurus pada saluran pendingin dengan penampang persegi panjang, yang bertujuan untuk mengetahui karaketristik perpindahan panas dan penurunan tekanan pada saluran segiempat dengan rusuk V berperforasi. Penelitian ini dilakukan secara analisa numerik  dengan model k-? digunakan dalam studi numerik untuk simulasi medan aliran. Saluran uji memiliki penampang persegi panjang 320 mm  x 120 mm lebar. Laju kecepatan aliran udara bervariasi mulai dari 0,2 m/s, 0,4 m/s, 0,8 m/s 1 m/s, 5m/s,10m/s, 15 m/s dan 20m/. Kontruksi rusuk, tinggi rusuk 10 mm, pitch 50mm rusuk padu dan variasi rusuk berlubang dengan diameter lubang 2mm,3mm,4mm,5mm. Pada rezim aliran laminar dan transisi belum terlihat secara nyata pengaruh dari konfigurasi rusuk padu maupun rusuk  berlubang terhadap perpindahan panas. Tetapi untuk aliran turbulen memberikan pengaruh lebih besar perpindahan panas antara rusuk padu dengan rusuk yang berlubang koefisien perpindahan panas meningkat seiring dengan meningkatnya bilangan Reynold. Pada rezim aliran laminar yaitu 500 < Re < 1300 penurunan tekanan pada rusuk padu lebih rendah dibandingkan dengan rusuk berlubang. Pada rezim aliran transisi 2700 < Re < 3700 dan aliran turbulen 20.000 < Re < 80.000 penurunan tekanan untuk konfigurasi rusuk padu lebih tinggi dibandingkan rusuk dengan lubang.
Rancang Bangun Tungku Heat Treatment Pandai Besi Untuk Peningkatan Produksi Pandai Besi di Kec.Brandan Barat Arya Rudi Nasution; Khairul Umurani; Iqbal Tanjung; Affandi A
ABDI SABHA (Jurnal Pengabdian kepada Masyarakat) Vol. 2 No. 2 (2021): Juni
Publisher : CERED Indonesia Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53695/jas.v2i2.459

Abstract

Keselamatan dan kesehatan kerja pada pekerja merupakan salah satu factor terpenting dalam pekerjaan. Kesehatan dan keselamatan kerja yang aman, nyaman dan sehat serta ramah lingkungan dapat mendorong efisiensi produktifitas yang berujung kepada kesejahteraan semua pihak, baik pengusaha maupun pekerja. Di Keluran Sei Tualang, Kecamatan Brandan Barat, Kabupaten Langkat terdapat usaha rumah tangga yaitu usaha pandai besi yang terdiri dari 2 sampai 3 orang pekerja termasuk didalamnya adalah pemilik usaha tersebut. Daerah ini adalah mayoritas masyarakatnya adalah penati kelapa sawit dan petani padi sehingga kebutuhan alat pertanian dan alat rumah tangga sangatlah melonjak. Permasalahan mitra adalah belum mampunya memperoduksi alat bantu masyarakat dan alat pertanian sesuai dengan pemesanan dalam kurun waktu yang ditentukan. Tujuan dari program ini ialah membuat alat tunggku heat treatment dan pelatihan serta pendampingan penggunaan alat agar nantinya mitra mampu menambah hasil produksinya atau mampu memenuhi pemesanan masyarakat dalam kurun waktu yang ditentukan. Dengan alat ini mitra diharapkan mampu mengoperasikan dan mendambah jumlah hasil produksi perharinya. 
Analisa numerik pengaruh diameter perforate terhadap perpindahan panas dan penurunan tekanan pada saluran segi empat 4:1 menggunakan perforated groove v- rib Khairul Umurani; Arya Rudi Nasution
Jurnal Teknik Mesin Indonesia Vol. 17 No. 2 (2022): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v17i2.299

Abstract

In the internal cooling ducts of the gas turbine blades, the rib structure is widely used to enhance convective heat transfer with the flow of coolant passing through the rib surface. This research concentrates on the perforated V-rib with grooved in the cooling channel with a rectangular cross-section. This research analyzes the heat transfer and pressure drop in the rectangular channel with a perforated groove v-rib to provide the cooling blade gas turbine solution. This research was conducted by numerical analysis. Several models were created and analyzed using Solidworks Flow Simulation, a commercial computational fluid dynamics (CFD) based on the finite volume method. Solidworks Flow Simulation Solver to analyze laminar and turbulent flow using the Reynolds averaged Navier-Stokes equation. Using the same transport equations for laminar and turbulent flows provides flexibility. Turbulence in the flow is treated using turbulent kinetic energy (k) and turbulence dissipation rate (ꞷ) using the standard k-ꞷ turbulence model. The Reynolds numbers 2000, 4000, 6000, 8000, 10000,12000,14000. By giving 1000 Watts of heat at the bottom of the channel, the air condition at the inlet temperature is 30 oC and a pressure of 1 atm. In the flow regime of 2000 < Re < 20,000, perforated rib construction significantly increases the Nusselt number compared to no rib. The coefficient of friction for the solid rib configuration is higher than for the rib with holes.
Development of new renewable energy hybrid system for simple home electricity purposes Rahmatullah Kasim; Khairul Umurani
SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin Vol 16, No 1 (2022): SINTEK JURNAL
Publisher : University of Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/sintek.16.1.46-52

Abstract

The need for energy has now become a major problem that is increasingly complex in all countries in the world to support their economic growth. These various conditions require the need for new renewable energy that can answer these challenges. Wind energy and solar cells have become one of the solutions to reduce dependence on fossil energy. Wind energy and solar energy are actually the most promising sources of energy considering their sustainable nature and very large amounts to be used as electrical energy for lighting in simple people's homes. A wind turbine is a prime mover that utilizes wind energy to drive the turbine blades which are then transformed in the form of mechanical energy to rotate the turbine shaft. Solar energy is energy in the form of light and heat from the sun, which technology can be applied to a variety of energies, including solar thermal electrical energy. New and renewable energy with hybrid or combined systems for home-scale power plants is very much needed to ensure the continuity of the existence of electrical energy and efficiency. The combined and hybrid system models that have been developed and applied are hybrid solar cells and wind turbines.
DESAIN MESIN SANGRAI KOPI DENGAN MENGGUNAKAN SENSOR THERMOCOUPLE KAPASITAS 2KG UNTUK PENINGKATAN PENDAPATAN USAHA UMKM DI KEC. NAMAN TERAN Arya Rudi Nasution; Khairul Umurani; Affandi; Muhammad Refan
ABDI SABHA (Jurnal Pengabdian kepada Masyarakat) Vol. 4 No. 3 (2023): Oktober
Publisher : CERED Indonesia Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53695/jas.v4i3.941

Abstract

Occupational safety and health are the most important factors in work because they can encourage productivity, which leads to the welfare of all parties, both employers and workers. One way to avoid work accidents and health problems for workers is to use personal protective equipment and production equipment that supports the processing of food and beverage ingredients (coffee beans). Coffee is an agricultural commodity that is used as a raw material for the food and beverage industry. In Kuta Rayat Village, Namanteran District, Karo Regency, there are household businesses and MSMEs roasting coffee beans, consisting of 2 to 3 Small and Medium Enterprises (MSMEs). The process of roasting coffee beans is done manually, so businesses still produce it on a small scale. The roasting process is carried out by roasting tubes that are rotated manually by Mr. Muhammad Iksan Ginting, which can cause harm to the health of business actors as well as roasting results that are not optimal. The roasting process is the process of forming the taste and aroma of coffee beans. If the coffee beans have a uniform size, specific gravity, texture, moisture content, and chemical structure, then the roasting process will be relatively easier to control. The reality is that coffee beans are so different that the roasting process is an art and requires as much skill and experience as consumer demands. Therefore, based on the problems encountered, it is necessary to design tools that can support the product production process. Coffee Roasting Machine With Smart Phone Control System 2kg Capacity.
Co-Authors A M Siregar A, Affandi Affandi Ahmad Marabdi Siregar Ahmad Syuhada Amiruddin, Arfis Andri Andri Arya R. Nasution Arya Rudi Nasution Asfiati, Sri Asri Aufa Afika Chairul Arif Gunawan Surbakti Chandra Amirsyah Putra Siregar D Irwansyah F, Fadhlurrohman Fariz Aulia Rachman Fathimah, Hafizah Siti Hadi Sucipto, Hadi Ira Devi Sara Masri ML Teguh Samudra Muhammad Hafiz Muhammad Refan Muharnif M Mukhlas Mukhlas Mulyadi Mulyadi Nurdin Hendri Pratama, Riza Fauzi Purwantono Purwantono Putera, Tondi Amirsyah Rahmatullah . Rahmatullah . Rahmatullah Rahmatullah Rakhmad Arief Siregar Refan, Muhammad Sandi, Didik Mei Saputra, Andrea Siregar, Munawar Alfansury Suriadi Tanjung, Iqbal Taufik Amri Tony Siagian Wahyu Kurniawan Wawan Septiawan Damanik Zufri, M Sayid